mash: Support ShelfModel access in Chrome.

ash/public/cpp/shelf_item_delegate.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_PUBLIC_CPP_SHELF_ITEM_DELEGATE_H_
 #define ASH_PUBLIC_CPP_SHELF_ITEM_DELEGATE_H_
 
 #include <string>
 
 #include "ash/public/cpp/ash_public_export.h"
 #include "ash/public/cpp/shelf_types.h"
 #include "ash/public/interfaces/shelf.mojom.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "mojo/public/cpp/bindings/binding.h"
 #include "ui/events/event.h"
 
 class AppWindowLauncherItemController;
 
 namespace ash {
 
 using MenuItemList = std::vector<mojom::MenuItemPtr>;
 
 // ShelfItemDelegate tracks some item state and serves as a base class for
 // various subclasses that implement the mojo interface.
 class ASH_PUBLIC_EXPORT ShelfItemDelegate : public mojom::ShelfItemDelegate {
  public:
   explicit ShelfItemDelegate(const ShelfID& shelf_id);
   ~ShelfItemDelegate() override;
 
   const ShelfID& shelf_id() const { return shelf_id_; }
   void set_shelf_id(const ShelfID& shelf_id) { shelf_id_ = shelf_id; }
   const std::string& app_id() const { return shelf_id_.app_id; }
   const std::string& launch_id() const { return shelf_id_.launch_id; }
 
   bool image_set_by_controller() const { return image_set_by_controller_; }
   void set_image_set_by_controller(bool image_set_by_controller) {
     image_set_by_controller_ = image_set_by_controller;
   }
 
+  // Returns a pointer to this instance, to be used by remote shelf models, etc.
+  mojom::ShelfItemDelegatePtr CreateInterfacePtrAndBind();
+
   // Returns items for the application menu; used for convenience and testing.
   virtual MenuItemList GetAppMenuItems(int event_flags);
 
   // Returns nullptr if class is not AppWindowLauncherItemController.
   virtual AppWindowLauncherItemController* AsAppWindowLauncherItemController();
 
  private:
   // The shelf id; empty if there is no app associated with the item.
   // Besides the application id, ShelfID also contains a launch id, which is an
   // id that can be passed to an app when launched in order to support multiple
   // shelf items per app. This id is used together with the app_id to uniquely
   // identify each shelf item that has the same app_id.
   ShelfID shelf_id_;
 
+  // A binding used by remote shelf item delegate users.
+  mojo::Binding<mojom::ShelfItemDelegate> binding_;
+
   // Set to true if the launcher item image has been set by the controller.
   bool image_set_by_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfItemDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_PUBLIC_CPP_SHELF_ITEM_DELEGATE_H_